I am starting a new fab shop, building my own tables (2) 30"x72" and (http://maplered.com) (1) 48"x96" 1 1/2" angle iron. I bought 12 trailer jacks from harbor freight to mount on each leg to roll and (http://maplered.com) for height adjustment, is the size ok? and (http://maplered.com) what do you think about the jacks? thanks steve